Category: 111-87-5

Pinheiro, Fernanda C. published the artcileDispersive liquid-liquid microextraction of Cd, Hg and Pb from medicines prior to ICP OES determination according to the United States Pharmacopeia, Application In Synthesis of 111-87-5, the main research area is cadmium mercury lead tablet dispersive liquid microextraction ICPOES.

A simple, sensitive and matrix-effect free anal. method for simultaneous determination of Cd, Hg and Pb in drug samples (i.e., com. dosage tablets) by inductively coupled plasma optical emission spectrometry (ICP OES) has been developed. According to the USP (USP) Chapter 232, those metals are considered elemental impurities from class 1 and they must be assessed in pharmaceutical production as well as in quality control evaluation. In order to increase the sensitivity of the anal., dispersive liquid-liquid microextraction (DLLME) was performed and seven factors affecting analyte extraction were optimized by multivariate anal. A microvolume of analyte enriched phase was directly introduced into the plasma using a multi-nebulizer, providing a high enrichment factor. When compared to conventional ICP OES anal., DLLME improves the limit of quantitation (LOQ) values on average 40-fold for all analytes. Consequently, LOQ values were significantly lower than their permissible daily exposure limits for oral drugs. Accuracy was evaluated by addition and recovery experiments following USP recommendations in eight com. drug samples. Recovery and RSD values were within the range of 90-108% and 1-9%, resp.

Analytical Methods published new progress about Centrifugation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application In Synthesis of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gomez, Sara published the artcileA molecular twist on hydrophobicity, COA of Formula: C8H18O, the main research area is organic solvent water binary system mol twist hydrophobicity.

A thorough exploration of the mol. basis for hydrophobicity with a comprehensive set of theor. tools and an extensive set of organic solvent S/water binary systems is discussed in this work. Without a single exception, regardless of the nature or structure of S, all quantum descriptors of bonding yield stabilizing S···water interactions, therefore, there is no evidence of repulsion and thus no reason for etymol. hydrophobicity at the mol. level. Our results provide mol. insight behind the exclusion of S mols. by water, customarily invoked to explain phase separation and the formation of interfaces, in favor of a complex interplay between entropic, enthalpic, and dynamic factors. S···water interfaces are not just thin films separating the two phases; instead, they are non-isotropic regions with d. gradients for each component whose macroscopic stability is provided by a large number of very weak dihydrogen contacts. We offer a definition of interface as the region in which the d. of the components in the A/B binary system is not constant At a fundamental level, our results contribute to better current understanding of hydrophobicity.

Chemical Science published new progress about Binary systems. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, COA of Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pakrieva, E. published the artcileGreen Oxidation of n-octanol on Supported Nanogold Catalysts: Formation of Gold Active Sites under Combined Effect of Gold Content, Additive Nature and Redox Pretreatment, Safety of n-Octanol, the main research area is green oxidation n octanol supported nanogold catalyst gold pretreatment.

The combined influence of gold content (0.5 or 4 weight %), modifying additives (La or Ce oxides) and redox pretreatments (H2 or O2) on catalytic properties and formation of active sites of Au/TiO2 in the selective oxidation of n-octanol under mild conditions was studied. Samples were characterized by BET, XRD, EDX, ICP, TEM, STEM-HAADF, CO2-TPD, H2-TPR and XPS methods. The order of catalytic activity depended on the support nature for all treated samples, as follows: Au/La2O3/TiO2>Au/CeO2/TiO2>Au/TiO2. The catalytic activity enhanced with the increase of gold loading in the samples with hydrogen pretreatment, while after the oxidative pretreatment of the catalysts the opposite dependence of the activity with the gold content was found. This catalytic behavior was explained by a change in the surface concentration of monovalent gold ions, which seemed to be the active sites. The most active catalyst, 0.5 % Au/La2O3/TiO2, pretreated in oxidative atm., had the highest surface concentration of monovalent gold ions.

ChemCatChem published new progress about Binding energy. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Safety of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hight-Huf, Nicholas published the artcileStabilization of Three-Particle Excitations in Monolayer MoS2 by Fluorinated Methacrylate Polymers, Recommanded Product: n-Octanol, the main research area is molybdenum sulfide monolayer fluorinated methacrylate polymer trion stabilization.

While extrinsic factors, such as substrates and chem. doping, are known to strongly influence visible photoemission from monolayer MoS2, key fundamental knowledge for p-type polymeric dopants is lacking. We investigated perturbations to the electronic environment of 2D MoS2 using fluorinated polymer coatings and specifically studied stabilization of three-particle states by monitoring changes in intensities and emission maxima of three-particle and two-particle emissions. We calculated changes in carrier d. and trion binding energy, the latter having an addnl. contribution from MoS2 polarization by the polymer. Polarization is further suggested by Kelvin probe force microscopy (KPFM) measurements of large Fermi level shifts. Changes similar in magnitude, but opposite in sign, were observed in 2D MoS2 coated with an analogous nonfluorinated polymer. These findings highlight the important interplay between electron exchange and electrostatic interactions at the interface between polymers and transition metal dichalcogenides (TMDCs), which govern fundamental electronic properties relevant to next-generation devices.

Journal of Physical Chemistry Letters published new progress about Binding energy. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Recommanded Product: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Khajone, Vijay B. published the artcileBronsted acid functionalized phthalocyanine on perylene diimide framework knotted with ionic liquid: An efficient photo-catalyst for production of biofuel component octyl levulinate at ambient conditions under visible light irradiation, Application of n-Octanol, the main research area is Bronsted acid functionalized phthalocyanine perylene diimide framework esterification; biofuel octyl levulinate visible light irradiation ionic liquid photocatalyst.

Novel Broensted acid functionalized phthalocyanine on perylene diimide framework knotted with ionic liquid (BAFPcPDIL) was synthesized and confirmed by instrumentation techniques. DRS-spectrum and Hammett value has been determined to confirm band-gap and proton levels of photo-catalyst, resp. The photo-catalytic performance was evaluated by production of octyl levulinate (OL) using levulinic acid (LA) with n-octyl alc. (OA) under visible light irradiations. Response surface methodol. (RSM) with Box-Behnken design (BBD) with 29 experiments was applied to explore consequences of 4 crucial process variables: catalyst loading (A), molar ratio of reactants (B) and power of visible light (C), duration in hour (D) on OL yield. From the model, the optimum conditions for the utmost conversion were found as: 10 mg catalyst with (1:1) alc. to LA molar ratio under 12 W lamp, in 12 h for completing esterification reaction with 95.58% yield of OL. With optimum conditions, various alkyl esters such as Me levulinate 92.14%, Et levulinate 93.12%, Pr levulinate 91.45%, isoPr levulinate 92.38%, Bu levulinate 85.13%, n-pentyl levulinate 86.35%, n-hexyl levulinate 89.57%, CMe3 levulinate 91.58%, were successfully synthesized with excellent yields. The plausible photocatalytic mechanism of the esterification reaction was also described. The study was extended on blending of OL with diesel sample in 10-30%, found comparable result of d., kinematic viscosity, calorific values, cetane number, flash, fire and pour point of the blended samples with blank diesel sample and appreciable changes in exhaust gases of 25% blended diesel sample. Addnl., BAFPcPDIL displayed good recyclability without loss of photo reactivity after 4 runs.

Fuel published new progress about Biodiesel fuel. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Xuan, Tiemin published the artcileAn optical study on spray and combustion characteristics of ternary hydrogenated catalytic biodiesel/methanol/n-octanol blends; part I: Spray morphology, ignition delay, and flame lift-off length, Category: alcohols-buliding-blocks, the main research area is biodiesel methanol octanol blend spray morphol optical combustion.

A fundamental study on spray morphol., ignition delay, and flame lift-off length of two ternary hydrogenated catalytic biodiesel (HCB)/methanol/n-octanol blends were carried out by performing visualization tests through high-speed Schlieren and OH* chemiluminescence simultaneously within a quiescent combustion chamber. The two ternary mixtures are 68% by volume HCB, 17% octanol, and 15% methanol, as well as 58% HCB, 17% octanol, and 25% methanol, which are denoted as M15 and M25 resp. It was found that the mixture stability of HCB/methanol is significantly enhanced using n-octanol as the co-solvent. The pure HCB (M0) was also tested under the same operating conditions as references All the sprays were injected into the chamber through an injector equipped with a single-hole nozzle. Exptl. results show that spray of M0 presents a faster penetration, following by M15 and M25, which is mainly caused by the shorter ignition delay of M0; With the increase of methanol percentage in the blends, the stoichiometric fuel mass fraction increases because of the high oxygen content of methanol, which contributes to a longer ignition delay; There are two factors of the blended fuel properties affecting flame lift-off length, namely stoichiometric fuel mass fraction and cetane number It was found the cetane number plays a much more important role than that of stoichiometric fuel mass fraction on lift-off length.

Fuel published new progress about Biodiesel fuel. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sidharth published the artcileComparison of properties of ternary fuel blends of diesel-octanol with biodiesel, COA of Formula: C8H18O, the main research area is biodiesel octanol nitrogen oxide transesterification petroleum diesel.

Biodiesel is adopted by many countries as a substitute to diesel and is used in blended form in a diesel engine. It has very similar properties to diesel. However, owing to slightly higher viscosity, d. and nitrogen oxide (NOX) emissions on burning, it still is not the best choice. Octanol, have similar properties to diesel. Octanol has added oxygen and also reduces the NOX emissions due to the quenching effect in the cylinder. However, its lower calorific value shall reduce engine performance. In the current study, waste cooking oil biodiesel is produced by a single step transesterification process and several blends of diesel, biodiesel and octanol were prepared Fourier-transform IR spectroscopy (FTIR) and oxidation stability tests of the produced biodiesel were performed. FTIR test confirmed the presence of biodiesel. Oxidation stability test of biodiesel was also passed as the induction time in over 6 h. Blends of diesel and octanol were prepared in proportion of diesel (95%, 90%, 85% and 80%) and octanol (5%, 10%, 15% and 20%). These blends were added to 3%, 5% and 10% biodiesel. Several physico-chem. properties namely d., viscosity, calorific value, flash point and cold filter plugging point (CFPP) were determined as per ASTM standards It is concluded that the 10% octanol, 90% diesel when mixed with 10% biodiesel showed very similar properties to diesel and shall be a viable alternative to petroleum diesel.

IOP Conference Series: Materials Science and Engineering published new progress about Biodiesel fuel. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, COA of Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Huber, Matthias C. published the artcileMinimalist Protocell Design: A Molecular System Based Solely on Proteins that Form Dynamic Vesicular Membranes Embedding Enzymatic Functions, Application In Synthesis of 111-87-5, the main research area is dynamic vesicular membrane amphiphilic elastin like protein; artificial cells; biocatalysis; enzyme catalysis; protocells; synthetic biology.

Life in its mol. context is characterized by the challenge of orchestrating structure, energy and information processes through compartmentalization and chem. transformations amenable to mimicry of protocell models. Here we present an alternative protocell model incorporating dynamic membranes based on amphiphilic elastin-like proteins (ELPs) rather than phospholipids. For the first time we demonstrate the feasibility of combining vesicular membrane formation and biocatalytic activity with mol. entities of a single class: proteins. The presented self-assembled protein-membrane-based compartments (PMBCs) accommodate either an anabolic reaction, based on free DNA ligase as an example of information transformation processes, or a catabolic process. We present a catabolic process based on a single mol. entity combining an amphiphilic protein with tobacco etch virus (TEV) protease as part of the enclosure of a reaction space and facilitating selective catalytic transformations. Combining compartmentalization and biocatalytic activity by utilizing an amphiphilic mol. building block with and without enzyme functionalization enables new strategies in bottom-up synthetic biol., regenerative medicine, pharmaceutical science and biotechnol.

ChemBioChem published new progress about Amphipathicity. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application In Synthesis of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Matsumiya, Masahiko published the artcileSeparation of palladium by solvent extraction with methylamino-bis-N,N-dioctylacetamide and direct electrodeposition from loaded organic phase, Synthetic Route of 111-87-5, the main research area is palladium solvent extraction methylaminodioctylacetamide formed organic phase direct electrodeposition.

The development of solvent extraction and direct electrodeposition processes is an important task to reduce the volume of secondary wastes. In this study, the extraction of Pd(II) from hydrochloric/chloride media using methylimino-bis-N,N-dioctylacetamide (MIDOA) in three diluents (acetophenone; AP, 1,2-dichloroethane; DCE, or 1-octanol; OC) was investigated. Slope anal. revealed that the extraction reaction of Pd(II) was based on the following anion exchange: [PdCl42-]aq + n[MIDOA]org ↔ [Pd(Cl)4-2n(MIDOA)2]2n-2org + 2n[Cl-]aq . The electrochem. behavior of the extracted Pd(II) complex in the MIDOA/AP bath was investigated using an electrochem. quartz crystal microbalance (EQCM). Pd(II) was found to be reduced to Pd(0) metal via a two-electron transfer, and the cathodic reaction [Pd(MIDOA)2]2+ + 2e- → Pd(0) + 2[MIDOA] was found to proceed in the region between -2.38 V and -3.40 V based on the apparent molar mass of 105.22 evaluated by EQCM. Moreover, the alternation of Δηρ corresponded to the local decrease in the viscosity of the organic phase near the electrode. The potentiostatic electrodeposition of the extracted Pd(II) complex enabled us to recover the blackish electrodeposits, which were identified as Pd metal through SEM/EDX, XPS, and XRD analyses.

Separation and Purification Technology published new progress about Anion exchange. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Synthetic Route of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lee, Wen-Chien published the artcilePolarity-Dependent Chemical Characteristics of Water-Soluble Organic Matter from Laboratory-Generated Biomass-Burning Revealed by 1-Octanol-Water Partitioning, Synthetic Route of 111-87-5, the main research area is biomass burning WSOM chem characteristic polarity octanol water partition.

Polarity distribution of water-soluble organic matter (WSOM) is an important factor in determining the hygroscopic and cloud nucleation abilities of organic aerosol particles. The authors applied a novel framework to quant. classify WSOM based on the 1-octanol-water partition coefficient (KOW), which often serves as a proxy of polarity. In this study, WSOM was generated in a laboratory biomass-burning experiment by smoldering of Indonesian peat and vegetation samples. The fractionated WSOM was analyzed using a UV-visible spectrophotometer, spectrofluorometer, and time-of-flight aerosol chem. speciation monitor. Several deconvolution methods, including pos. matrix factorization, parallel factor anal., and least-squares anal., were applied to the measured spectra, resulting in three classes of WSOM. The highly polar fraction of WSOM, which predominantly exists in the range of log KOW <0, is highly oxygenated and exhibits similar optical properties as those of light-absorbing humic-like substances (HULIS, termed after the humic substances due to the similarity in chem. characteristics). WSOM in the least-polar fraction, which mainly distributes in log KOW >1, mostly consists of hydrocarbon-like and high mol. weight species. In between the most- and least-polar fraction, WSOM in the marginally polar fraction likely contains aromatic compounds The analyses have also suggested the existence of HULIS with different polarities. Comparison with previous studies indicates that only WSOM in the highly polar fraction (log KOW <0) likely contributes to water uptake. Environmental Science & Technology published new progress about Acacia mangium. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Synthetic Route of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts